You're not getting it. You can't date anything non-biological using carbon dating. It's not that you get the wrong answer. You get no answer, since you don't know a-priori what the ratio of C12 to C14 was when the sample was formed. The equations are under-constrained.
You can still use radiological dating with other elements (e.g. Uranium).
Difficult to get what was not said in the comment I'm replying to. So fine, I don't know my dating techniques. Uranium radiological dating sounds fine. Why not that?
>> if it turned out to come from the future
> I don't even…
have a sense of humor? It is certainly possible if we had a extra-terrestrial organic matter (which we don't) that it could test as coming from the future based on carbon ratios, though obviously it would not actually be from the future - thus "on that scale".
I'm not sure if the same applies to Uranium radiological dating.
As you say though, it's not good in the billions.